布匹的燃点为53℃。
参考答案:错
---Three people got killed by two explosions.
---When was __________?
---________ was on April 15 __________ the 2013 Boston Marathon was being held.
A.that; It; when
B.this; This; that
C.this; It; when
D.that; It; that
b/s是用来衡量计算机系统哪项性能指标的
A.存储容量
B.时钟频率
C.运算速度
D.数据传输速度